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sasho [114]
3 years ago
9

What is a concentration in science?​

Chemistry
2 answers:
yawa3891 [41]3 years ago
8 0

Amounts of a substance. Another definition would be the ratio of solute in a solution

MrRissso [65]3 years ago
3 0

Concentration is the amount of substance per defined space. Another definition is the ratio of solute in a solution to either solvent or total solution. :)

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What happens during a mosquito 6 chromosomes to form eggs.
lbvjy [14]
<span>Since the diploid number of mosquitoes is six, that means that there are 6 chromosomes in every somatic (non-reproductive) cell,including the cells that make up the stomach.The six chromosomes represent two three-chromosome sets the mosquito received one set of three chromosomes from the egg cell of the mother and a similar set of three chromosomes from the sperm cell of the father.</span>
7 0
3 years ago
Free fall is a situation in which the only force acting upon an object is gravity. Why do all objects in free fall have
STatiana [176]

Answer:

Because the acceleration due to gravity does not depend on the mass of the object

Explanation:

An object is said to be in free fall if there is only one force acting on it: the force of gravity, whose magnitude is

F=mg

where

m is the mass of the object

g=9.8 m/s^2 is the acceleration due to gravity

From the formula, we observe that the force of gravity acting on an object depends on its mass. However, its acceleration does not. In fact, according to Newton's second law of motion, the net force acting on an object is equal to the product between its mass and its acceleration:

F=ma

where a is the acceleration. By combining the two equations, we get:

ma=mg\\\rightarrow a = g

which means that the acceleration of any object in free fall is equal to g, the acceleration due to gravity, because it does not depend on the mass of the object.

6 0
3 years ago
By mistake, a quart of oil was dumped into a swimming pool that measures 25.0 m by 30.0 m. The density of the oil was 0.750 g/cm
kondor19780726 [428]

The oil slick thick = 1.256 x 10⁻⁴ cm

<h3>Further explanation</h3>

Volume is a derivative quantity derived from the length of the principal

The unit of volume can be expressed in liters or milliliters or cubic meters

The conversion is

1 cc = 1 cm3

1 dm = 1 Liter

1 L = 1.06 quart

<em>so for 1 quart = 0.943 L</em>

\tt 0.943~L=0.943\times 10^{-3}m^3

Volume of oil dumped = volume of swimming pool

\tt 0.943\times 10^{-3}~m^3=25\times 30\times h(h=thick)\\\\h=\dfrac{0.943\times 10^{-3}}{750~m^2}=1.257\times 10^{-6}~m=\boxed{\bold{1.256\times 10^{-4}~cm}}

3 0
3 years ago
what is the approximate area of a regular pentagon with a side lenghtt of 6 feet and a distance from the center to a vertex of 6
Degger [83]
A regular pentagon may be divided into 5 congruent triangles.


If the side of the pentagon is 6 feet, each base of the triangles will be 6 feet.


If the distance from the center to a vertex is 6 feet, all the sides of the triangles will 6 feet.


So there are 5 congruent, equilateral triangles each with side equal to 6 feet.


The area one of those triangles is calculateb by:


base * height / 2


height ^2 = (side length) ^2 - (side length /2)^2 = 6^2 - 3^2 = 36 - 9 = 27


=> height = √(27) ≈ 5.2 feet


And, using area = base * height / 2 ,


area of a triangle = 6 feet * 5.2 feet / 2 = 15.6 feet^2


And the area of the entire pentagon equals 5 triangles ≈ 5 * 15.6 feet^2 = 78 feet^2


Answer: 78 feet^2
6 0
3 years ago
All atoms of an element have the same number of
hram777 [196]
Protons but different number of neutrons are called isotopes
4 0
3 years ago
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